@misc{indiciae262655cd9bd3,
  title = {Preliminary geologic map, central part of the Gassendi Crater of the moon},
  author = {K. A. Howard},
  year = {1972},
  doi = {10.3133/ofr72170},
  url = {https://pubs.usgs.gov/publication/ofr72170},
  note = {Source identifier: ofr72170}
}